Plate-clamping mechanism for printing presses



A Q 2 C g 1927 w. EvENsEN PLATE CLAMPING MECANISM FOR PRINTING PRESSES lFiled Feb. 2. 192s IN1/mme.

M TTORNEYS.

.f page plate,

Patented ug. 2, 1927. Y UNITED STATE WILLIAM EVENSEN,

-PATENT OFFICE.

OF CHICAGOfILLINOIS, ASSIGNOR TO GOSS PRINTING PRESS COMPANY, A CORPORATION AOIE ILLINOIS.A i

'PLATE-@Murine MEcHANisM Fon PRINTING PRESSES.

a plate vclamping mechanism permitting a quick and easy change whereby, a doublev page plate may be quickly clamped on the cylinder in lieu of twosingle page plates, and' vice* versa.

My invention further relatesfto an innerl clip and means for quickly and expeditiously connecting it to, or removing it from,the

clip rod to permit the change from clamping f two single page plates, to clamping a double or vice versa.

` 'i Objects and advantages of the invention will be set forth in part hereinafter and in part will 4be obvious herefrom, or may be learned by practice withthe invention, lthe same beingrealized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts,

constructions, arrangements, combinations and improvements herein shown and described. i

` The accompanying drawings, `referred to herein and constituting a part hereof,- illustrate one embodiment oit the invention, and together withthe description, serve to explain the principles of the invention.

My present invention is an improvement upon my U. S. Patent 1,503,941, `patented August ,5, 1924, to Com any of Chicago, Illinois, as assignee.

Ot the'drawing'sz- Fig. 1 is a'longitudinalvertical section through a plate cylinder, equipped with my plate clamping mechanism, showing two one page plates locked tothe plate cylinder;

Fig. 2 is a longitudinal vertical section, similar to Fig. 1, but with the inner clip V'removed to permit `a doublel page plate to be clamped to the plate cylinder; t Y. Fig. 3-is a vtransverse vertical section on theline 3 3 of Fig. 1;` f

Fig. 4 is a perspective view of the inner clip provided with one form ot latching mechanism; y Fig. 5 is a fragmentary horizontal section through lthe inner clip to more clearly illustrate the latching device. y

In printing a newspaper, or other printed product, it is frequently desirable to change vfrom single page plates @9 duble .Page

Application led February the Gross yPrinting Press 1 2,A 1926. serial No.y 85,425. .y

plates. To do this itis necessary to remove the inner movable clipsso that the outer movable clips will clamp the double page y plate against the fixed clip or abutment yin the center of the platecylinderlf- The removal' of these inner vclips takes considerable time and `is veryk inconvenient because the end nut or nuts on the clip rods,.whichV have'. to be removed, are in a groove beneath the surface of the plate cylinder.y i

By my invention I` form a plate clamping mechanism in which the inner clip can be quickly and expeditiously connected to the clip rod, when it is desired to print from rsingle page plates; or, when it is desired to change and print from a .double page plate, the inner clip can be quicklydiscon- `nected from the clip rod and removed from the plate cylinder, to be subsequentlyy replaced when it is again desired to print from single kpage plates instead of a double page plate.

Il have shown in the drawings one embodiment of my invention in which the vplat-e cylinder 1 is provided withthe ordinary xed clip or abutment 2 in the center of the cylinder 1. The plate cylinder is also provided with thefordinary Aclip slot 3 having an enlarged opening 4. In the orm of my invention shown in Fig. 1, but to which my invention is not to be limited, the clip rod is formed in two sections, the inner clip rod 5 and the outer clip vrod 6, the two sections being connected by v cooperating screwthreads 7 on thel clip rod 5 and female screw-threads 8 on the outer clip rod 6.

` The operation of this dividedy screw-threaded Yprevented 'from rotary movement, as described more in detail in my patent previously referred to. y y

In Fig.` 1 of the drawings the inner single page plate 12 is clamped between the fixed clip or abutment 2 and the movable inner clip 13, theouter single page plate 14 being clamped between the inner clip 13 and the outer clip 15. This inner clip 13 is provided with a nonscrew-threaded axial-bore 114 to permit the free passage of the screwthreaded end 15 ot the inner yclip rod 5. Qn

, pivotedtothe clip 13 by the screw 23., "Y

free end 24 `is, "preferably provided with this" clip rod is mounted a nut 16 and alsopreferal'ily a check nut V1T, the nut 113 engag- 'iin the inner `clip` 13 to- `.clamp the inner single page plate 12 againstfthelixed clip liandl'efQQoi-iie end of which isli'ipset at 26110 seciire the'handle to the latch 21, and also Ato `forni locking member Which Will snap into 1.5 a de" liienoeof thelatch 21 is such that when iff. l Mteravith thedepression 27p, the latch will "nap into its loclredposition and beheld in that nennen.

lllfhenit isdesiiied to remove the inner page plate and the outer f:single i .jpage `plate 14 the inner clip rod 5 and the oiitei eliprod Gareoperated in the manner f described in my"paten`t, fpreviously. relerred to`,` which ivill move the clip rods to the left "ofFigj 1Q The shoulder 19 on the'inner' l filip rod l5 vvill `engage Withtherlatcli 21 and `"canse the` inner clip 13 'to/"he movedtothe` 5W left a 'siiilicient distance `to free the inner single page `plate 41.2, so that can here moved and-another singlepage plate substituted i'o'r it it desiredh` lllhenltheclip` lrods 5 and Ginoveto theleft the outerl clip i4 "'15 yreleases the Y ,other vsingleQpage plate :1'-1, A. so `hat another single page plate may be substituted for it; if' desired.

` Then `it-"isvdesired to change from tivo` single pagefplates 12 12h to .a `Single 4) double A"page plateV 3Q "(Fig. 2), this "can readily, Vbe doneby pulling np on the 'handleE ".Z'fon the latch 21,` the innerplate 12 having y previoiisly'been removed,` so `thatthe latch 4Avril. assiimethe dotted position shoivn in' p 434 Fig. 4, clearing the shoulder 19 in the clip v 3"5."It`is thena -very siin'pleniatter to move the inner clip `13'along the 'clip slot 3 until the opening 4 is reached `vvhen the in- .nerclip 1? can he readily removed from the 59 lplate..cylinder 1.' This leaves the `plate clamping mechanism` "ready yto `clamp a .i `double:page plate 'BO (Fig. b etvveeri the .onterfclip 15 and the fined clip or abutnient 2.

-l/Vhenit is desired toback1 from a page plate to 'tivo singleE page yl'qlcaties 1,2% and 14E shown 1,"tl1is` can xreadilyfbe"done by removing the plate. 30,

andftheirfrepositioningfthe inner clip 13" in 69p fthe opening d, sliding it alongthe clip' n Sito the left until itfassnmes'its original A y ;position'.inengagement with thefnut '16,

operator causing the locking srf'ace 261:0 snap into the recess 27 in the inner clip,

iession V27 in "the inner clip The oli' the most important factorsin `printing 'a ,.i l Qiiewspaper or other printedproduct'. loclingnieinber 26 isthroughtinto .regis- ,printing lpresss,-the combination. ot clip rod, `"ajfclip, and` a "pivolted1 spring latchto Totedlineans to) en 7 a""c`lip to'hold iprinting'vplate's on la. plate thereby bringingithehitch 21 intoitsloperative position to cooperate with the shoulder 19 on the inner clip rod .5.

s While 'i `inve esente 1 sitrfjiy tree-irriping mechanism it is oi course to be under'- stood thata plurality ogtusuch clamping devices are employed to hold each plate7 as described in my patentpreviously referred to,

and that each inner clip Would have to be removed to permit the clamping of a double `)aire alate.

l It Will be seen that my invention Avery simple and convenient to. operate, andisthat it Will save a great dealfof time Whichis one` The invention inits'fbioa-der aspectfsisfnot limited to the `specific mechanisms sliovvn fand described `but departures may Vbeflnade therefrom Within *the scoper of the L accom- 85 between the clip and -c'liprod. u "il i 2. In al plate' clamping mechanism `for printing `presses the combination ofv aclip,

aclip rod, one of said members heingyprovided with a' recess and the other inember with a latch to cooperate with tlierecess.

U3. In a plate :clamping `mechanism for printing `pr'essesfthe combination offa clip rod, a clip,` and gpivoted means to connect and disconnect the clip 4tothe clip rod.A 4.

4. In" la Aplate clamping mechanism for lll-i `printing presses the combination of a clip rod,` aaclipg and pivoted `"nlieans securedto the clip to connect anddilsconnectwthe lip tothe clip rod. i ii. `5. In a plate clamping mechanism' fo 1U? lprinting presses,the combination cfa clip fred", a clip,v and a"pivotedla`tch= to "connect and `disconnect the cli-p tothe clip rod.

. `6."In" a plate clamping mechanism for connect and disconnei'itthe clip to `the clip rod. 1" i i E A rie'vv articlevof mannfactnre compris.- f. 'ing arclip to hold printing pla-tes on "a plate fc5/linden* said clip being provided with `piv-` "gage land disengage a'clip lOd. i i 8; 'Ane'tv article om'anufactue co'inprisff-125 cylinder: said cli'pbeirrg providedwvith a pivoted spring latch? to vengage.andfdisen- #gage clip red;

\ .nl fewer-anser Iffanufaalrfeiiiifiising an inner clip to holdY printingjplates" se .Y

on plate cylinders, said inner clip being provided with a non-threaded bore and with means to engage and disengage a clip rod` 10. A new article of manufacture comprising a clip to hold printing plates on a plate cylinder said clip being provided with a pivoted spring latch to engage and disengage a clip rod, and a handle on the spring latcn.

l1. A new article of manufacture comprising a clip to hold printing plates on a plate cylinder said clip being provided with a pivoted spring latch to engage and disengage a clip rod, and locking means to hold the free end of the spring latch in a pre determined operative position upon the clip.

' 12. A new article of manufacture comprising a clip to hold printing plateson a plate cylinder said clip being provided with a pivoted spring latch to engage and disengage a clip rod, locking means to hold the free end of the spring'latch in a predetermined position upon the clip, and a handle on the spring latch.

In testimony whereof, I have signed my name to this specification.

WILLIAM EvEvsENT 

